WaterlinespeedrevJune 3, 2024 « Back to Glossary IndexThe line where the water’s edge meets the hull of a ship when it is afloat. See also: Horizontal Zero Line Load Waterline Related Articles: Glossary: Transom SternGlossary: TumblehomeGlossary: BallastGlossary: BarnacleGlossary: Between Perpendiculars« Back to Glossary Index